Supercharger structure



Feb. 1931. w, BURGESS 1,793,903

SUPERCHARGER STRUCTURE Filed Feb. s, 1928 r 2 Sheets-Sheet 1 17?0677207" W'ali'ar .76. B u'ztess JZZZOrney Feb. 24, 1931. w. K. BURGESS1,793,903

SUPERCHARGER STRUCTURE 2 1928 2 Sheets-Sheet 2 Filed O water/K2521?"ears rn y Patented Feb. 24, 1931 j UNITED srATEs PATENT; OFFICE.

l 1L Bananas, or snrrn Monica, oa'mromna surnacnaaena sraoo'ruaaApplication flied February 3, 1928. Serial No. 251,816.

This invention relates to a turbine air compressor andsupercharger forinternal comustion engines, and has for its object to providea device ofthis class which is particuf6 larly simple in constructiom'positiveandefwith certain improvements for efiecting a the casing,

- olted together at 7 As shown in i piston tight seal between theimpeller and assists in complete vaporization of theli u1d fuel, andincreases the compression of t e gas to a high point of efficiency.

The invention further consists of certain other details of constructionand combinations of parts, all of which will be first fully describedand afterwards specifically pointed out in the appended claims.

Referring to the'accompanying drawings:

Fig. 1 is a side elevation partly in vertical section of the deviceconstructed in accordancewith my invention.

,partly in elevation of the device, and

Fig. 3 is a transverse sectional view through one of the blades of theimpeller.

Like numerals of reference\ indicate the same parts throughout theseveral figures, in which:

1 indicates the device, which includes the impeller 2 and easing 3,which casin is comosed of two sections 4 and 5 havin anges 6 1, the

casing 3 1s provided with a tangentia outlet 8, flanged at 9 to receivea check valve or other fitting as may be desired.

The central portion of'the casing portion 5, is rovided with a trueVenturi opening 10, to w ich a carburetting device may be at tachedinany approved manner.

it a packing nut 13.

Centrally of the complemental casing por-' tion is a housing 11,threaded at 12 to. receive Within said housing 11, I dispose twoballbearing races 14 and 15, spaced apart by a 1 bearing-spacer 16,while against each of said races 14 and 15, I provide a felt washer 17to be compressed by the provide an oil tight assem 1y. 1,

Connected to t e housing 11 is an oil feed line :18, preferably from theoil pressure sys tem of the motor to which the device is attached, whilethe bearing spacer 16 is perforated to permit oil under pressure fromthe feed line 18 to enter within the spacer 16, which forms an oilchamber 19.

- The impeller 2 includes a plurality of radial blades 20, radiatingfrom a hub 21, mounted acking nut 13 to on a hollow drive shaft 22running on the bearings 14 and 15, which shaftis erforated at 23 toreceive oil from the oil c amber 19 within the same. Connecting with thesaid hollow shaft 22 are oil ports-24 disposed in the impeller bladesnear each edge thereof, as shown in Fig. 3, while the actual edges ofsaid blades are provided with a V shaped oil groove 25 whichcommunicates with the said oil orts 24 at predetermined points as shownin ig. 2.

The casing 3 is shaped to form an annular tubular-like chamber 26 at itsouter extremity, while the same is sharply reduced at 27 to rovide aVenturi formation immediately ad acent to and opening into saidtubularlike chamber 26.-

The blades 20 of the impeller 2 are formed to closely conform to theshape of the casing and preferably so as to provide a clearance of notmore than .006", though those ortions of the impeller blades 20immediate y adjacent the outer venturi 10 are formed with straightvertical edges 28 so as to provide ample spaces between the impellerblades 20 to receive the gas passing through the said venturi 10.

Having thus described the invention its operation is as follows:

The gas passingthrough the'venturi 10 is accelerated and enters thechambers formed between the blades '20 of the impeller 2. B

in'the impeller adjacent the outer venturi 1*0,

and increases the acceleration of the pas passing through said outerventuri 10 an into the impeller 2.

The efiective compression of the gas and efficiency of the entire deviceis increased by the oil seal which is established within the V shapedgrooves in the edges of the 1111-. peller blades 20, which oil seal isefiectively maintained by the oil pressure from the oil line 18augmented by centrifugal force carrying the oil from the oil chamber 19outwardly through the oil ports 24 and into the V shaped oil grooves 25.By this construction, a piston-tight seal i esta lished and effectivelymaintained, so

- that the highest degree of eihciency is obprefer to tained inoperation. The gas thus compressed and vaporized under the influence ofthe rotatin impeller is delivered to the outlet 8 toget or with suchexcess oil as may escape from the oil seals, which oil is carried to themotor for lubricating purposes as will be'fully understood by thoseskilled in the art. In

, order. to relieve the device from excess temperature due to frictionand compression, I

provide the casing 3 withradiating 3.

lo I have shown and described a preferred embodiment of the invention, Ido not wish to be understood as limiting myself to.

V the exact construction herein set forth, as I considermyself clearlyentitled to all such changes and modifications as fall within the limitand scope of the appended claims.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is

l. A device of the character described ineluding a rotatable impeller, acasing for said did - shaped impeller, the said casing being centrallyprovided with a Venturi opening, and tangentially provided with anoutlet, the said casing also including an annular tubular-like chamherat the extremity thereof and a Venturi Iportion communicating with saidtubularsaid oil chamber, the blades of said impeller vided with aVenturi opening,

closely conforming to the formation of the Said casing and provided withoil orts'to recerve oilfrom said hollow shaft, t e edges of said bladesbeing provided with an oilseal groove in communication with the said oilports.

2. A device of the character described including a rotatable impeller, acasing for said lmpeller, the'said casing being centrallyprov andtangentlally provided with an outlet, the said casmg also including anannular tubular-like chamber at the extremity thereof and a Venturishaped portion communicating with said tubular-like chamber, a housingincluding an oil chamber, a hollow shaft to receive oil from said oilchamber, the blades of said impeller ke chamber, a housing including a 1.oil chamber, a hollow shaft to receive oil from ima es v with a Venturiopening and tangentially provided with an outlet, said casing alsoincluding an annular tubular-like chamber at the extremity thereof and aVenturi shaped portion communicating with said tubular-like chamber, ahousing including an oil chamber, the blades of the impeller closelyconforming to the formation of the said casing and provided with meansfor receiving oil from the oil chamber to establish an oil seal at theedges of said blades.

4. A device of the-character described ineluding a rotatable impeller, acasing for said impeller, the casing being centrally provided with aVenturi opening, and tangentially provided with an outlet, the saidcasing also including an annular tubular-like chamber at the extremitythereof and a Venturi shaped portion communicating with said tubularlikechamber,- the blades of the impeller closely conforming to the formationof the said casing, and provided with means to receive oil to establishan oil seal atthe edges of said blades.

5 A device of the character described including a rotatable impeller, acasing for said impeller, said casing being centrally provided with aninlet opening and tangentially provided with an outlet the said casingalso including an annular chamber at the extremity thereof and a Venturishaped portion communicating with said annular chamber, the blades ofsaid impeller closely conforming to the formation of the casing andprovided with means for establishing an oil seal at the edges of thesaid blades.

In testimony whereof I afiix my signature.

' WALTER K. BURGESS, let. M. A. C.

